Hey Trevor,
have you ever thought about running different size tires front and back. For example a according to BFG's site, a 315/35/17 has the same diameter as a 275/40/17. There both 25.7" but the 315 is 12.6" wide on a 11" rim. That would work with the AWD system, and give you some hellacious meat in the back for grip. I think the only major draw back would be you would have to much grip in the back and snap your output shaft, or spin the shit out of your fronts and ruin your VCU. I would look cool as shit though, 275's front and 315's rear
